java -Xmx8000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --generate-csv --csv-dir csv -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label51_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dd2f093 [2018-07-24 14:30:25,517 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-07-24 14:30:25,518 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-07-24 14:30:25,537 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-07-24 14:30:25,537 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-07-24 14:30:25,538 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-07-24 14:30:25,539 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-07-24 14:30:25,541 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-07-24 14:30:25,543 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-07-24 14:30:25,544 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-07-24 14:30:25,545 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-07-24 14:30:25,545 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-07-24 14:30:25,546 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-07-24 14:30:25,547 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-07-24 14:30:25,548 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-07-24 14:30:25,549 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-07-24 14:30:25,550 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-07-24 14:30:25,552 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-07-24 14:30:25,554 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-07-24 14:30:25,555 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-07-24 14:30:25,556 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-07-24 14:30:25,558 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-07-24 14:30:25,560 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-07-24 14:30:25,560 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-07-24 14:30:25,561 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-07-24 14:30:25,561 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-07-24 14:30:25,563 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-07-24 14:30:25,563 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-07-24 14:30:25,564 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-07-24 14:30:25,565 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-07-24 14:30:25,566 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-07-24 14:30:25,566 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-07-24 14:30:25,567 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-07-24 14:30:25,567 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-07-24 14:30:25,568 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-07-24 14:30:25,569 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-07-24 14:30:25,569 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-07-24 14:30:25,585 INFO L110 SettingsManager]: Loading preferences was successful [2018-07-24 14:30:25,585 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-07-24 14:30:25,586 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-07-24 14:30:25,586 INFO L133 SettingsManager]: * User list type=DISABLED [2018-07-24 14:30:25,586 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-07-24 14:30:25,586 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-07-24 14:30:25,587 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-07-24 14:30:25,587 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-07-24 14:30:25,587 INFO L133 SettingsManager]: * Log string format=TERM [2018-07-24 14:30:25,587 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-07-24 14:30:25,587 INFO L133 SettingsManager]: * Interval Domain=false [2018-07-24 14:30:25,588 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-07-24 14:30:25,588 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-07-24 14:30:25,589 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-07-24 14:30:25,589 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-07-24 14:30:25,589 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-07-24 14:30:25,589 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-07-24 14:30:25,589 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-07-24 14:30:25,590 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-07-24 14:30:25,590 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-07-24 14:30:25,590 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-07-24 14:30:25,591 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-07-24 14:30:25,591 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-07-24 14:30:25,591 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 14:30:25,591 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-07-24 14:30:25,591 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-07-24 14:30:25,592 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-07-24 14:30:25,592 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-07-24 14:30:25,592 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-07-24 14:30:25,592 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-07-24 14:30:25,592 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-07-24 14:30:25,592 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-07-24 14:30:25,593 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-07-24 14:30:25,659 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-07-24 14:30:25,673 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-07-24 14:30:25,677 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-07-24 14:30:25,679 INFO L271 PluginConnector]: Initializing CDTParser... [2018-07-24 14:30:25,679 INFO L276 PluginConnector]: CDTParser initialized [2018-07-24 14:30:25,680 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label51_true-unreach-call_false-termination.c [2018-07-24 14:30:26,066 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b32f552f/d5e1d4dc28b343a083ca1bf1e698d995/FLAG14e7982bc [2018-07-24 14:30:26,371 INFO L276 CDTParser]: Found 1 translation units. [2018-07-24 14:30:26,372 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label51_true-unreach-call_false-termination.c [2018-07-24 14:30:26,395 INFO L324 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b32f552f/d5e1d4dc28b343a083ca1bf1e698d995/FLAG14e7982bc [2018-07-24 14:30:26,418 INFO L332 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b32f552f/d5e1d4dc28b343a083ca1bf1e698d995 [2018-07-24 14:30:26,430 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-07-24 14:30:26,432 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-07-24 14:30:26,433 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-07-24 14:30:26,433 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-07-24 14:30:26,444 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-07-24 14:30:26,444 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 02:30:26" (1/1) ... [2018-07-24 14:30:26,447 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66832ad0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:26, skipping insertion in model container [2018-07-24 14:30:26,447 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.07 02:30:26" (1/1) ... [2018-07-24 14:30:26,666 INFO L179 PRDispatcher]: Starting pre-run dispatcher in SV-COMP mode [2018-07-24 14:30:26,993 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 14:30:27,013 INFO L422 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-07-24 14:30:27,162 INFO L175 PostProcessor]: Settings: Checked method=main [2018-07-24 14:30:27,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:27 WrapperNode [2018-07-24 14:30:27,210 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-07-24 14:30:27,211 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-07-24 14:30:27,211 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-07-24 14:30:27,211 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-07-24 14:30:27,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:27" (1/1) ... [2018-07-24 14:30:27,263 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:27" (1/1) ... [2018-07-24 14:30:27,359 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-07-24 14:30:27,360 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-07-24 14:30:27,360 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-07-24 14:30:27,360 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-07-24 14:30:27,371 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:27" (1/1) ... [2018-07-24 14:30:27,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:27" (1/1) ... [2018-07-24 14:30:27,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:27" (1/1) ... [2018-07-24 14:30:27,378 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:27" (1/1) ... [2018-07-24 14:30:27,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:27" (1/1) ... [2018-07-24 14:30:27,631 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:27" (1/1) ... [2018-07-24 14:30:27,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:27" (1/1) ... [2018-07-24 14:30:27,663 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-07-24 14:30:27,664 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-07-24 14:30:27,664 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-07-24 14:30:27,664 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-07-24 14:30:27,667 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-07-24 14:30:27,739 INFO L130 BoogieDeclarations]: Found specification of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_output [2018-07-24 14:30:27,740 INFO L138 BoogieDeclarations]: Found implementation of procedure __U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_output [2018-07-24 14:30:27,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-07-24 14:30:27,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-07-24 14:30:27,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-07-24 14:30:27,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-07-24 14:30:27,741 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-07-24 14:30:27,741 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-07-24 14:30:31,487 INFO L261 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-07-24 14:30:31,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 02:30:31 BoogieIcfgContainer [2018-07-24 14:30:31,488 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-07-24 14:30:31,490 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-07-24 14:30:31,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-07-24 14:30:31,496 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-07-24 14:30:31,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.07 02:30:26" (1/3) ... [2018-07-24 14:30:31,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72c5a46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 02:30:31, skipping insertion in model container [2018-07-24 14:30:31,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.07 02:30:27" (2/3) ... [2018-07-24 14:30:31,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72c5a46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.07 02:30:31, skipping insertion in model container [2018-07-24 14:30:31,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.07 02:30:31" (3/3) ... [2018-07-24 14:30:31,500 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label51_true-unreach-call_false-termination.c [2018-07-24 14:30:31,508 INFO L132 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-07-24 14:30:31,517 INFO L144 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-07-24 14:30:31,571 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-07-24 14:30:31,571 INFO L373 AbstractCegarLoop]: Interprodecural is true [2018-07-24 14:30:31,572 INFO L374 AbstractCegarLoop]: Hoare is true [2018-07-24 14:30:31,572 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-07-24 14:30:31,572 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-07-24 14:30:31,572 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-07-24 14:30:31,572 INFO L378 AbstractCegarLoop]: Difference is false [2018-07-24 14:30:31,572 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-07-24 14:30:31,573 INFO L384 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-07-24 14:30:31,600 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-07-24 14:30:31,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-07-24 14:30:31,616 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:30:31,617 INFO L353 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:30:31,618 INFO L414 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:30:31,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1331312812, now seen corresponding path program 1 times [2018-07-24 14:30:31,625 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:30:31,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:31,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:31,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:31,671 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:30:31,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:32,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:30:32,066 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:30:32,066 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-07-24 14:30:32,067 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:30:32,073 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 14:30:32,089 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 14:30:32,090 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 14:30:32,092 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-07-24 14:30:34,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:30:34,068 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-07-24 14:30:34,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 14:30:34,071 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2018-07-24 14:30:34,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:30:34,092 INFO L225 Difference]: With dead ends: 691 [2018-07-24 14:30:34,092 INFO L226 Difference]: Without dead ends: 434 [2018-07-24 14:30:34,099 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-07-24 14:30:34,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-07-24 14:30:34,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-07-24 14:30:34,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-07-24 14:30:34,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 767 transitions. [2018-07-24 14:30:34,192 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 767 transitions. Word has length 42 [2018-07-24 14:30:34,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:30:34,193 INFO L471 AbstractCegarLoop]: Abstraction has 434 states and 767 transitions. [2018-07-24 14:30:34,193 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 14:30:34,193 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 767 transitions. [2018-07-24 14:30:34,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-07-24 14:30:34,202 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:30:34,203 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:30:34,203 INFO L414 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:30:34,204 INFO L82 PathProgramCache]: Analyzing trace with hash 737639281, now seen corresponding path program 1 times [2018-07-24 14:30:34,204 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:30:34,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:34,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:34,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:34,211 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:30:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:34,646 WARN L169 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-07-24 14:30:34,746 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:30:34,746 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:30:34,747 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 14:30:34,747 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:30:34,749 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:30:34,749 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:30:34,750 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 14:30:34,750 INFO L87 Difference]: Start difference. First operand 434 states and 767 transitions. Second operand 6 states. [2018-07-24 14:30:39,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:30:39,172 INFO L93 Difference]: Finished difference Result 1239 states and 2245 transitions. [2018-07-24 14:30:39,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 14:30:39,172 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2018-07-24 14:30:39,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:30:39,181 INFO L225 Difference]: With dead ends: 1239 [2018-07-24 14:30:39,182 INFO L226 Difference]: Without dead ends: 811 [2018-07-24 14:30:39,186 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 14:30:39,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2018-07-24 14:30:39,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 793. [2018-07-24 14:30:39,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 793 states. [2018-07-24 14:30:39,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1286 transitions. [2018-07-24 14:30:39,285 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1286 transitions. Word has length 119 [2018-07-24 14:30:39,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:30:39,286 INFO L471 AbstractCegarLoop]: Abstraction has 793 states and 1286 transitions. [2018-07-24 14:30:39,286 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:30:39,286 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1286 transitions. [2018-07-24 14:30:39,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-07-24 14:30:39,300 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:30:39,301 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:30:39,301 INFO L414 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:30:39,301 INFO L82 PathProgramCache]: Analyzing trace with hash 2003461293, now seen corresponding path program 1 times [2018-07-24 14:30:39,302 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:30:39,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:39,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:39,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:39,303 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:30:39,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:39,539 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:30:39,539 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:30:39,539 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-07-24 14:30:39,540 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:30:39,540 INFO L450 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-07-24 14:30:39,540 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-07-24 14:30:39,540 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-07-24 14:30:39,541 INFO L87 Difference]: Start difference. First operand 793 states and 1286 transitions. Second operand 6 states. [2018-07-24 14:30:42,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:30:42,410 INFO L93 Difference]: Finished difference Result 2180 states and 3699 transitions. [2018-07-24 14:30:42,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-07-24 14:30:42,410 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 137 [2018-07-24 14:30:42,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:30:42,424 INFO L225 Difference]: With dead ends: 2180 [2018-07-24 14:30:42,425 INFO L226 Difference]: Without dead ends: 1393 [2018-07-24 14:30:42,428 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-07-24 14:30:42,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2018-07-24 14:30:42,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 1369. [2018-07-24 14:30:42,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1369 states. [2018-07-24 14:30:42,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2183 transitions. [2018-07-24 14:30:42,507 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2183 transitions. Word has length 137 [2018-07-24 14:30:42,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:30:42,509 INFO L471 AbstractCegarLoop]: Abstraction has 1369 states and 2183 transitions. [2018-07-24 14:30:42,510 INFO L472 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-07-24 14:30:42,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2183 transitions. [2018-07-24 14:30:42,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-07-24 14:30:42,517 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:30:42,517 INFO L353 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:30:42,518 INFO L414 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:30:42,518 INFO L82 PathProgramCache]: Analyzing trace with hash 284885404, now seen corresponding path program 1 times [2018-07-24 14:30:42,518 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:30:42,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:42,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:42,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:42,523 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:30:42,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:30:42,868 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-07-24 14:30:42,869 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-07-24 14:30:42,869 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:30:42,869 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:30:42,870 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:30:42,870 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-07-24 14:30:42,870 INFO L87 Difference]: Start difference. First operand 1369 states and 2183 transitions. Second operand 5 states. [2018-07-24 14:30:47,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:30:47,895 INFO L93 Difference]: Finished difference Result 3839 states and 6076 transitions. [2018-07-24 14:30:47,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 14:30:47,898 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 222 [2018-07-24 14:30:47,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:30:47,916 INFO L225 Difference]: With dead ends: 3839 [2018-07-24 14:30:47,917 INFO L226 Difference]: Without dead ends: 2476 [2018-07-24 14:30:47,926 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-07-24 14:30:47,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2018-07-24 14:30:47,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 2408. [2018-07-24 14:30:47,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2408 states. [2018-07-24 14:30:48,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 3424 transitions. [2018-07-24 14:30:48,010 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 3424 transitions. Word has length 222 [2018-07-24 14:30:48,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:30:48,011 INFO L471 AbstractCegarLoop]: Abstraction has 2408 states and 3424 transitions. [2018-07-24 14:30:48,011 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:30:48,011 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 3424 transitions. [2018-07-24 14:30:48,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-07-24 14:30:48,016 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:30:48,017 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:30:48,017 INFO L414 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:30:48,017 INFO L82 PathProgramCache]: Analyzing trace with hash 2105212668, now seen corresponding path program 1 times [2018-07-24 14:30:48,017 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:30:48,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:48,018 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:48,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:48,019 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:30:48,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:48,526 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:30:48,527 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:30:48,527 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:30:48,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:48,544 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:30:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:48,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:30:49,043 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:30:49,044 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:30:49,493 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:30:49,531 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:30:49,531 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:30:49,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:49,559 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:30:49,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:49,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:30:50,124 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:30:50,125 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:30:50,874 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:30:50,878 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:30:50,879 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 13 [2018-07-24 14:30:50,879 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:30:50,880 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 14:30:50,880 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 14:30:50,881 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-07-24 14:30:50,881 INFO L87 Difference]: Start difference. First operand 2408 states and 3424 transitions. Second operand 9 states. [2018-07-24 14:30:56,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:30:56,137 INFO L93 Difference]: Finished difference Result 6394 states and 9831 transitions. [2018-07-24 14:30:56,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-07-24 14:30:56,138 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 232 [2018-07-24 14:30:56,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:30:56,168 INFO L225 Difference]: With dead ends: 6394 [2018-07-24 14:30:56,169 INFO L226 Difference]: Without dead ends: 3992 [2018-07-24 14:30:56,194 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 944 GetRequests, 922 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2018-07-24 14:30:56,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3992 states. [2018-07-24 14:30:56,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3992 to 3942. [2018-07-24 14:30:56,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3942 states. [2018-07-24 14:30:56,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3942 states to 3942 states and 5452 transitions. [2018-07-24 14:30:56,319 INFO L78 Accepts]: Start accepts. Automaton has 3942 states and 5452 transitions. Word has length 232 [2018-07-24 14:30:56,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:30:56,320 INFO L471 AbstractCegarLoop]: Abstraction has 3942 states and 5452 transitions. [2018-07-24 14:30:56,320 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 14:30:56,320 INFO L276 IsEmpty]: Start isEmpty. Operand 3942 states and 5452 transitions. [2018-07-24 14:30:56,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-07-24 14:30:56,332 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:30:56,333 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:30:56,333 INFO L414 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:30:56,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1773550456, now seen corresponding path program 1 times [2018-07-24 14:30:56,333 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:30:56,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:56,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:56,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:30:56,334 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:30:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:56,912 WARN L169 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-07-24 14:30:57,586 WARN L169 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 20 [2018-07-24 14:30:57,725 WARN L169 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2018-07-24 14:30:57,864 WARN L169 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2018-07-24 14:30:58,156 WARN L169 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 19 [2018-07-24 14:30:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 163 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-07-24 14:30:58,702 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:30:58,702 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:30:58,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:30:58,712 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:30:58,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:30:58,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:30:58,897 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-07-24 14:30:58,897 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:30:59,024 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-07-24 14:30:59,045 INFO L309 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-07-24 14:30:59,046 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [10] total 11 [2018-07-24 14:30:59,046 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:30:59,046 INFO L450 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-07-24 14:30:59,047 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-07-24 14:30:59,047 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:30:59,047 INFO L87 Difference]: Start difference. First operand 3942 states and 5452 transitions. Second operand 3 states. [2018-07-24 14:31:00,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:31:00,426 INFO L93 Difference]: Finished difference Result 9739 states and 14155 transitions. [2018-07-24 14:31:00,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-07-24 14:31:00,427 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 250 [2018-07-24 14:31:00,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:31:00,476 INFO L225 Difference]: With dead ends: 9739 [2018-07-24 14:31:00,476 INFO L226 Difference]: Without dead ends: 5808 [2018-07-24 14:31:00,518 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 498 SyntacticMatches, 9 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:31:00,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5808 states. [2018-07-24 14:31:00,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5808 to 5680. [2018-07-24 14:31:00,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5680 states. [2018-07-24 14:31:00,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5680 states to 5680 states and 7590 transitions. [2018-07-24 14:31:00,714 INFO L78 Accepts]: Start accepts. Automaton has 5680 states and 7590 transitions. Word has length 250 [2018-07-24 14:31:00,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:31:00,715 INFO L471 AbstractCegarLoop]: Abstraction has 5680 states and 7590 transitions. [2018-07-24 14:31:00,715 INFO L472 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-07-24 14:31:00,715 INFO L276 IsEmpty]: Start isEmpty. Operand 5680 states and 7590 transitions. [2018-07-24 14:31:00,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2018-07-24 14:31:00,740 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:31:00,741 INFO L353 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:31:00,741 INFO L414 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:31:00,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1322443291, now seen corresponding path program 1 times [2018-07-24 14:31:00,741 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:31:00,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:31:00,742 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:00,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:31:00,743 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:31:00,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:01,264 WARN L169 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 10 [2018-07-24 14:31:01,474 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 70 proven. 101 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:31:01,475 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:31:01,475 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:31:01,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:01,483 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:31:01,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:01,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:31:01,871 WARN L169 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-07-24 14:31:01,963 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-07-24 14:31:01,963 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:31:02,252 WARN L169 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-07-24 14:31:02,684 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 70 proven. 101 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:31:02,705 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:31:02,705 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-07-24 14:31:02,706 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:31:02,706 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:31:02,707 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:31:02,707 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-07-24 14:31:02,707 INFO L87 Difference]: Start difference. First operand 5680 states and 7590 transitions. Second operand 5 states. [2018-07-24 14:31:05,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:31:05,556 INFO L93 Difference]: Finished difference Result 13078 states and 16867 transitions. [2018-07-24 14:31:05,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 14:31:05,564 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 261 [2018-07-24 14:31:05,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:31:05,593 INFO L225 Difference]: With dead ends: 13078 [2018-07-24 14:31:05,593 INFO L226 Difference]: Without dead ends: 6673 [2018-07-24 14:31:05,614 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 517 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2018-07-24 14:31:05,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6673 states. [2018-07-24 14:31:05,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6673 to 5899. [2018-07-24 14:31:05,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5899 states. [2018-07-24 14:31:05,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5899 states to 5899 states and 7470 transitions. [2018-07-24 14:31:05,765 INFO L78 Accepts]: Start accepts. Automaton has 5899 states and 7470 transitions. Word has length 261 [2018-07-24 14:31:05,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:31:05,766 INFO L471 AbstractCegarLoop]: Abstraction has 5899 states and 7470 transitions. [2018-07-24 14:31:05,766 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:31:05,766 INFO L276 IsEmpty]: Start isEmpty. Operand 5899 states and 7470 transitions. [2018-07-24 14:31:05,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2018-07-24 14:31:05,783 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:31:05,784 INFO L353 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:31:05,784 INFO L414 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:31:05,784 INFO L82 PathProgramCache]: Analyzing trace with hash -287807432, now seen corresponding path program 1 times [2018-07-24 14:31:05,784 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:31:05,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:31:05,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:05,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:31:05,786 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:31:05,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:06,771 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 193 proven. 183 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:31:06,771 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:31:06,771 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:31:06,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:06,780 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:31:06,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:06,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:31:07,427 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 292 proven. 53 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-07-24 14:31:07,428 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:31:08,120 WARN L169 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2018-07-24 14:31:08,513 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 115 proven. 261 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:31:08,534 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:31:08,534 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:31:08,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:08,551 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:31:08,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:08,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:31:09,286 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 292 proven. 53 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-07-24 14:31:09,286 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:31:10,022 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 115 proven. 261 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-07-24 14:31:10,024 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:31:10,024 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8, 8, 8] total 26 [2018-07-24 14:31:10,024 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:31:10,025 INFO L450 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-07-24 14:31:10,025 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-07-24 14:31:10,026 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2018-07-24 14:31:10,026 INFO L87 Difference]: Start difference. First operand 5899 states and 7470 transitions. Second operand 15 states. [2018-07-24 14:31:12,830 WARN L169 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2018-07-24 14:31:15,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:31:15,236 INFO L93 Difference]: Finished difference Result 12148 states and 15473 transitions. [2018-07-24 14:31:15,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-07-24 14:31:15,236 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 346 [2018-07-24 14:31:15,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:31:15,265 INFO L225 Difference]: With dead ends: 12148 [2018-07-24 14:31:15,266 INFO L226 Difference]: Without dead ends: 6414 [2018-07-24 14:31:15,277 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 1428 GetRequests, 1381 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=431, Invalid=1375, Unknown=0, NotChecked=0, Total=1806 [2018-07-24 14:31:15,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6414 states. [2018-07-24 14:31:15,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6414 to 5919. [2018-07-24 14:31:15,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5919 states. [2018-07-24 14:31:15,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5919 states to 5919 states and 7104 transitions. [2018-07-24 14:31:15,403 INFO L78 Accepts]: Start accepts. Automaton has 5919 states and 7104 transitions. Word has length 346 [2018-07-24 14:31:15,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:31:15,403 INFO L471 AbstractCegarLoop]: Abstraction has 5919 states and 7104 transitions. [2018-07-24 14:31:15,403 INFO L472 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-07-24 14:31:15,403 INFO L276 IsEmpty]: Start isEmpty. Operand 5919 states and 7104 transitions. [2018-07-24 14:31:15,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2018-07-24 14:31:15,421 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:31:15,421 INFO L353 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:31:15,422 INFO L414 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:31:15,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1745999349, now seen corresponding path program 1 times [2018-07-24 14:31:15,422 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:31:15,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:31:15,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:15,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:31:15,423 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:31:15,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:15,901 WARN L169 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-07-24 14:31:16,797 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 337 proven. 243 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2018-07-24 14:31:16,797 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:31:16,798 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:31:16,805 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:16,805 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:31:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:16,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:31:17,126 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 322 proven. 0 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2018-07-24 14:31:17,127 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:31:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 140 proven. 275 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2018-07-24 14:31:17,594 INFO L309 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-07-24 14:31:17,594 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [14, 5] total 18 [2018-07-24 14:31:17,595 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-07-24 14:31:17,595 INFO L450 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-07-24 14:31:17,595 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-07-24 14:31:17,595 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2018-07-24 14:31:17,596 INFO L87 Difference]: Start difference. First operand 5919 states and 7104 transitions. Second operand 5 states. [2018-07-24 14:31:19,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:31:19,941 INFO L93 Difference]: Finished difference Result 14526 states and 17742 transitions. [2018-07-24 14:31:19,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-07-24 14:31:19,948 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 445 [2018-07-24 14:31:19,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:31:19,973 INFO L225 Difference]: With dead ends: 14526 [2018-07-24 14:31:19,973 INFO L226 Difference]: Without dead ends: 8613 [2018-07-24 14:31:19,988 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 884 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2018-07-24 14:31:19,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8613 states. [2018-07-24 14:31:20,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8613 to 7899. [2018-07-24 14:31:20,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7899 states. [2018-07-24 14:31:20,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7899 states to 7899 states and 9458 transitions. [2018-07-24 14:31:20,139 INFO L78 Accepts]: Start accepts. Automaton has 7899 states and 9458 transitions. Word has length 445 [2018-07-24 14:31:20,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:31:20,140 INFO L471 AbstractCegarLoop]: Abstraction has 7899 states and 9458 transitions. [2018-07-24 14:31:20,140 INFO L472 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-07-24 14:31:20,140 INFO L276 IsEmpty]: Start isEmpty. Operand 7899 states and 9458 transitions. [2018-07-24 14:31:20,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2018-07-24 14:31:20,167 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:31:20,168 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:31:20,168 INFO L414 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:31:20,168 INFO L82 PathProgramCache]: Analyzing trace with hash 468259100, now seen corresponding path program 1 times [2018-07-24 14:31:20,169 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:31:20,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:31:20,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:20,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:31:20,170 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:31:20,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:20,577 WARN L169 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-07-24 14:31:21,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1120 backedges. 402 proven. 474 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2018-07-24 14:31:21,319 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:31:21,319 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:31:21,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:21,329 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:31:21,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:21,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:31:21,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1120 backedges. 833 proven. 2 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2018-07-24 14:31:21,680 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:31:22,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1120 backedges. 344 proven. 144 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2018-07-24 14:31:22,131 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:31:22,132 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:31:22,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:22,147 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:31:22,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:22,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:31:22,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1120 backedges. 829 proven. 6 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2018-07-24 14:31:22,731 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:31:23,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1120 backedges. 344 proven. 144 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2018-07-24 14:31:23,207 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:31:23,208 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5, 5, 5] total 16 [2018-07-24 14:31:23,208 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:31:23,209 INFO L450 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-07-24 14:31:23,210 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-07-24 14:31:23,210 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2018-07-24 14:31:23,210 INFO L87 Difference]: Start difference. First operand 7899 states and 9458 transitions. Second operand 14 states. [2018-07-24 14:31:29,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:31:29,414 INFO L93 Difference]: Finished difference Result 17817 states and 21592 transitions. [2018-07-24 14:31:29,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-07-24 14:31:29,417 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 556 [2018-07-24 14:31:29,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:31:29,443 INFO L225 Difference]: With dead ends: 17817 [2018-07-24 14:31:29,444 INFO L226 Difference]: Without dead ends: 9324 [2018-07-24 14:31:29,467 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2294 GetRequests, 2247 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=445, Invalid=1717, Unknown=0, NotChecked=0, Total=2162 [2018-07-24 14:31:29,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9324 states. [2018-07-24 14:31:29,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9324 to 9037. [2018-07-24 14:31:29,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9037 states. [2018-07-24 14:31:29,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9037 states to 9037 states and 10224 transitions. [2018-07-24 14:31:29,631 INFO L78 Accepts]: Start accepts. Automaton has 9037 states and 10224 transitions. Word has length 556 [2018-07-24 14:31:29,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:31:29,632 INFO L471 AbstractCegarLoop]: Abstraction has 9037 states and 10224 transitions. [2018-07-24 14:31:29,632 INFO L472 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-07-24 14:31:29,632 INFO L276 IsEmpty]: Start isEmpty. Operand 9037 states and 10224 transitions. [2018-07-24 14:31:29,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2018-07-24 14:31:29,659 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:31:29,659 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:31:29,659 INFO L414 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:31:29,660 INFO L82 PathProgramCache]: Analyzing trace with hash 842969381, now seen corresponding path program 1 times [2018-07-24 14:31:29,660 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:31:29,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:31:29,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:29,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:31:29,661 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:31:29,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:30,202 WARN L169 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-07-24 14:31:30,418 WARN L169 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-07-24 14:31:30,646 WARN L169 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 14:31:31,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1164 backedges. 506 proven. 471 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-07-24 14:31:31,573 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:31:31,574 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:31:31,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:31,583 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:31:31,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:31,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:31:32,212 WARN L169 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-07-24 14:31:32,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1164 backedges. 852 proven. 2 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2018-07-24 14:31:32,757 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:31:33,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1164 backedges. 500 proven. 105 refuted. 0 times theorem prover too weak. 559 trivial. 0 not checked. [2018-07-24 14:31:33,503 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:31:33,503 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:31:33,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:33,518 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:31:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:33,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:31:34,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1164 backedges. 644 proven. 210 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2018-07-24 14:31:34,353 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:31:35,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1164 backedges. 211 proven. 674 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-07-24 14:31:35,383 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:31:35,384 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5, 8, 8] total 16 [2018-07-24 14:31:35,384 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:31:35,385 INFO L450 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-07-24 14:31:35,385 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-07-24 14:31:35,385 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2018-07-24 14:31:35,385 INFO L87 Difference]: Start difference. First operand 9037 states and 10224 transitions. Second operand 13 states. [2018-07-24 14:31:38,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:31:38,782 INFO L93 Difference]: Finished difference Result 18289 states and 21232 transitions. [2018-07-24 14:31:38,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-07-24 14:31:38,782 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 567 [2018-07-24 14:31:38,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:31:38,813 INFO L225 Difference]: With dead ends: 18289 [2018-07-24 14:31:38,814 INFO L226 Difference]: Without dead ends: 9420 [2018-07-24 14:31:38,831 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2298 GetRequests, 2257 SyntacticMatches, 17 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2018-07-24 14:31:38,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9420 states. [2018-07-24 14:31:38,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9420 to 9205. [2018-07-24 14:31:38,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9205 states. [2018-07-24 14:31:39,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9205 states to 9205 states and 10206 transitions. [2018-07-24 14:31:39,003 INFO L78 Accepts]: Start accepts. Automaton has 9205 states and 10206 transitions. Word has length 567 [2018-07-24 14:31:39,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:31:39,004 INFO L471 AbstractCegarLoop]: Abstraction has 9205 states and 10206 transitions. [2018-07-24 14:31:39,004 INFO L472 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-07-24 14:31:39,004 INFO L276 IsEmpty]: Start isEmpty. Operand 9205 states and 10206 transitions. [2018-07-24 14:31:39,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 668 [2018-07-24 14:31:39,036 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:31:39,037 INFO L353 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:31:39,037 INFO L414 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:31:39,037 INFO L82 PathProgramCache]: Analyzing trace with hash 27461053, now seen corresponding path program 2 times [2018-07-24 14:31:39,038 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:31:39,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:31:39,039 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:39,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:31:39,039 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:31:39,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:40,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1667 backedges. 653 proven. 656 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2018-07-24 14:31:40,790 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:31:40,791 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:31:40,798 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 14:31:40,798 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 14:31:41,004 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 14:31:41,004 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 14:31:41,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:31:41,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1667 backedges. 1162 proven. 2 refuted. 0 times theorem prover too weak. 503 trivial. 0 not checked. [2018-07-24 14:31:41,344 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:31:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1667 backedges. 466 proven. 144 refuted. 0 times theorem prover too weak. 1057 trivial. 0 not checked. [2018-07-24 14:31:42,218 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:31:42,218 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:31:42,233 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-07-24 14:31:42,233 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-07-24 14:31:42,734 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-07-24 14:31:42,734 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-07-24 14:31:42,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:31:43,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1667 backedges. 1079 proven. 8 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked. [2018-07-24 14:31:43,323 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:31:43,527 WARN L169 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-07-24 14:31:44,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1667 backedges. 79 proven. 1039 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2018-07-24 14:31:44,964 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:31:44,965 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5, 5, 8, 9] total 31 [2018-07-24 14:31:44,965 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:31:44,966 INFO L450 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-07-24 14:31:44,966 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-07-24 14:31:44,967 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2018-07-24 14:31:44,967 INFO L87 Difference]: Start difference. First operand 9205 states and 10206 transitions. Second operand 19 states. [2018-07-24 14:31:52,184 WARN L169 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 27 [2018-07-24 14:31:54,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:31:54,571 INFO L93 Difference]: Finished difference Result 20275 states and 23286 transitions. [2018-07-24 14:31:54,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-07-24 14:31:54,572 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 667 [2018-07-24 14:31:54,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:31:54,602 INFO L225 Difference]: With dead ends: 20275 [2018-07-24 14:31:54,602 INFO L226 Difference]: Without dead ends: 10336 [2018-07-24 14:31:54,630 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2747 GetRequests, 2671 SyntacticMatches, 7 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=926, Invalid=4044, Unknown=0, NotChecked=0, Total=4970 [2018-07-24 14:31:54,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10336 states. [2018-07-24 14:31:54,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10336 to 9145. [2018-07-24 14:31:54,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9145 states. [2018-07-24 14:31:54,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9145 states to 9145 states and 10030 transitions. [2018-07-24 14:31:54,817 INFO L78 Accepts]: Start accepts. Automaton has 9145 states and 10030 transitions. Word has length 667 [2018-07-24 14:31:54,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:31:54,818 INFO L471 AbstractCegarLoop]: Abstraction has 9145 states and 10030 transitions. [2018-07-24 14:31:54,818 INFO L472 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-07-24 14:31:54,819 INFO L276 IsEmpty]: Start isEmpty. Operand 9145 states and 10030 transitions. [2018-07-24 14:31:54,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 697 [2018-07-24 14:31:54,835 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:31:54,836 INFO L353 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:31:54,836 INFO L414 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:31:54,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1733374948, now seen corresponding path program 1 times [2018-07-24 14:31:54,836 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:31:54,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:31:54,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-07-24 14:31:54,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:31:54,838 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:31:54,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:55,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1319 backedges. 533 proven. 134 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-07-24 14:31:55,644 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:31:55,644 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:31:55,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:55,654 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:31:55,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:55,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:31:56,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1319 backedges. 956 proven. 2 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2018-07-24 14:31:56,234 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:31:56,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1319 backedges. 533 proven. 134 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-07-24 14:31:56,608 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:31:56,608 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:31:56,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:31:56,623 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:31:57,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:31:57,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:31:57,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1319 backedges. 956 proven. 2 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2018-07-24 14:31:57,420 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:31:57,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1319 backedges. 533 proven. 134 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2018-07-24 14:31:57,878 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:31:57,878 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 9 [2018-07-24 14:31:57,878 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:31:57,879 INFO L450 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-07-24 14:31:57,879 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-07-24 14:31:57,879 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-07-24 14:31:57,880 INFO L87 Difference]: Start difference. First operand 9145 states and 10030 transitions. Second operand 7 states. [2018-07-24 14:32:00,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:32:00,151 INFO L93 Difference]: Finished difference Result 24802 states and 30121 transitions. [2018-07-24 14:32:00,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-24 14:32:00,152 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 696 [2018-07-24 14:32:00,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:32:00,210 INFO L225 Difference]: With dead ends: 24802 [2018-07-24 14:32:00,211 INFO L226 Difference]: Without dead ends: 15849 [2018-07-24 14:32:00,253 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 2800 GetRequests, 2785 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-07-24 14:32:00,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15849 states. [2018-07-24 14:32:00,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15849 to 15315. [2018-07-24 14:32:00,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15315 states. [2018-07-24 14:32:00,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15315 states to 15315 states and 17039 transitions. [2018-07-24 14:32:00,594 INFO L78 Accepts]: Start accepts. Automaton has 15315 states and 17039 transitions. Word has length 696 [2018-07-24 14:32:00,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:32:00,595 INFO L471 AbstractCegarLoop]: Abstraction has 15315 states and 17039 transitions. [2018-07-24 14:32:00,596 INFO L472 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-07-24 14:32:00,596 INFO L276 IsEmpty]: Start isEmpty. Operand 15315 states and 17039 transitions. [2018-07-24 14:32:00,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 857 [2018-07-24 14:32:00,627 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:32:00,628 INFO L353 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:32:00,628 INFO L414 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:32:00,628 INFO L82 PathProgramCache]: Analyzing trace with hash -894345036, now seen corresponding path program 1 times [2018-07-24 14:32:00,628 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:32:00,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:32:00,629 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:32:00,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:32:00,629 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:32:00,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:32:02,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1988 backedges. 788 proven. 480 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2018-07-24 14:32:02,567 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:32:02,567 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:32:02,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:32:02,575 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:32:02,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:32:02,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:32:03,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1988 backedges. 1289 proven. 2 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2018-07-24 14:32:03,323 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:32:03,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1988 backedges. 736 proven. 134 refuted. 0 times theorem prover too weak. 1118 trivial. 0 not checked. [2018-07-24 14:32:03,797 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:32:03,797 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:32:03,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:32:03,812 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:32:04,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:32:04,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:32:04,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1988 backedges. 1289 proven. 2 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2018-07-24 14:32:04,844 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:32:05,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1988 backedges. 736 proven. 134 refuted. 0 times theorem prover too weak. 1118 trivial. 0 not checked. [2018-07-24 14:32:05,546 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:32:05,547 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5, 5, 5] total 22 [2018-07-24 14:32:05,547 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:32:05,548 INFO L450 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-07-24 14:32:05,549 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-07-24 14:32:05,549 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2018-07-24 14:32:05,549 INFO L87 Difference]: Start difference. First operand 15315 states and 17039 transitions. Second operand 20 states. [2018-07-24 14:32:09,254 WARN L169 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2018-07-24 14:32:17,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:32:17,212 INFO L93 Difference]: Finished difference Result 32167 states and 36959 transitions. [2018-07-24 14:32:17,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-07-24 14:32:17,213 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 856 [2018-07-24 14:32:17,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:32:17,254 INFO L225 Difference]: With dead ends: 32167 [2018-07-24 14:32:17,254 INFO L226 Difference]: Without dead ends: 13712 [2018-07-24 14:32:17,396 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3545 GetRequests, 3458 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2248 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1356, Invalid=5954, Unknown=0, NotChecked=0, Total=7310 [2018-07-24 14:32:17,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13712 states. [2018-07-24 14:32:17,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13712 to 12568. [2018-07-24 14:32:17,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12568 states. [2018-07-24 14:32:17,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12568 states to 12568 states and 13450 transitions. [2018-07-24 14:32:17,634 INFO L78 Accepts]: Start accepts. Automaton has 12568 states and 13450 transitions. Word has length 856 [2018-07-24 14:32:17,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:32:17,635 INFO L471 AbstractCegarLoop]: Abstraction has 12568 states and 13450 transitions. [2018-07-24 14:32:17,636 INFO L472 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-07-24 14:32:17,636 INFO L276 IsEmpty]: Start isEmpty. Operand 12568 states and 13450 transitions. [2018-07-24 14:32:17,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 964 [2018-07-24 14:32:17,656 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:32:17,657 INFO L353 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:32:17,657 INFO L414 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:32:17,658 INFO L82 PathProgramCache]: Analyzing trace with hash 549859241, now seen corresponding path program 1 times [2018-07-24 14:32:17,658 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:32:17,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:32:17,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:32:17,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:32:17,659 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:32:17,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:32:18,975 WARN L169 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-07-24 14:32:19,353 WARN L169 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-07-24 14:32:20,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3005 backedges. 879 proven. 1286 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2018-07-24 14:32:20,966 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:32:20,966 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:32:20,977 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:32:20,977 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:32:21,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:32:21,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:32:22,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3005 backedges. 1865 proven. 2 refuted. 0 times theorem prover too weak. 1138 trivial. 0 not checked. [2018-07-24 14:32:22,065 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:32:22,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3005 backedges. 895 proven. 182 refuted. 0 times theorem prover too weak. 1928 trivial. 0 not checked. [2018-07-24 14:32:22,759 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:32:22,759 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:32:22,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:32:22,775 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:32:23,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:32:23,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:32:23,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3005 backedges. 1860 proven. 25 refuted. 0 times theorem prover too weak. 1120 trivial. 0 not checked. [2018-07-24 14:32:23,894 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:32:24,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3005 backedges. 895 proven. 182 refuted. 0 times theorem prover too weak. 1928 trivial. 0 not checked. [2018-07-24 14:32:24,705 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:32:24,706 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6, 5, 5] total 22 [2018-07-24 14:32:24,706 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:32:24,707 INFO L450 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-07-24 14:32:24,708 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-07-24 14:32:24,708 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2018-07-24 14:32:24,708 INFO L87 Difference]: Start difference. First operand 12568 states and 13450 transitions. Second operand 17 states. [2018-07-24 14:32:24,900 WARN L169 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2018-07-24 14:32:28,399 WARN L169 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 23 [2018-07-24 14:32:28,726 WARN L169 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2018-07-24 14:32:29,942 WARN L169 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 40 [2018-07-24 14:32:30,495 WARN L169 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2018-07-24 14:32:32,790 WARN L169 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2018-07-24 14:32:34,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:32:34,176 INFO L93 Difference]: Finished difference Result 25804 states and 28335 transitions. [2018-07-24 14:32:34,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-07-24 14:32:34,176 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 963 [2018-07-24 14:32:34,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:32:34,205 INFO L225 Difference]: With dead ends: 25804 [2018-07-24 14:32:34,206 INFO L226 Difference]: Without dead ends: 13428 [2018-07-24 14:32:34,229 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 3941 GetRequests, 3877 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=939, Invalid=3351, Unknown=0, NotChecked=0, Total=4290 [2018-07-24 14:32:34,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13428 states. [2018-07-24 14:32:34,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13428 to 12630. [2018-07-24 14:32:34,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12630 states. [2018-07-24 14:32:34,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12630 states to 12630 states and 13406 transitions. [2018-07-24 14:32:34,457 INFO L78 Accepts]: Start accepts. Automaton has 12630 states and 13406 transitions. Word has length 963 [2018-07-24 14:32:34,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:32:34,458 INFO L471 AbstractCegarLoop]: Abstraction has 12630 states and 13406 transitions. [2018-07-24 14:32:34,458 INFO L472 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-07-24 14:32:34,458 INFO L276 IsEmpty]: Start isEmpty. Operand 12630 states and 13406 transitions. [2018-07-24 14:32:34,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1003 [2018-07-24 14:32:34,473 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:32:34,474 INFO L353 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:32:34,474 INFO L414 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:32:34,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1193503768, now seen corresponding path program 1 times [2018-07-24 14:32:34,474 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:32:34,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:32:34,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:32:34,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:32:34,476 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:32:34,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:32:37,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3016 backedges. 682 proven. 1363 refuted. 0 times theorem prover too weak. 971 trivial. 0 not checked. [2018-07-24 14:32:37,313 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:32:37,313 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:32:37,320 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:32:37,320 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:32:37,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:32:37,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:32:38,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3016 backedges. 2048 proven. 2 refuted. 0 times theorem prover too weak. 966 trivial. 0 not checked. [2018-07-24 14:32:38,095 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:32:39,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3016 backedges. 683 proven. 431 refuted. 0 times theorem prover too weak. 1902 trivial. 0 not checked. [2018-07-24 14:32:39,068 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:32:39,068 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:32:39,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:32:39,090 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:32:39,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:32:39,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:32:40,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3016 backedges. 1935 proven. 6 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2018-07-24 14:32:40,726 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:32:41,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3016 backedges. 1314 proven. 257 refuted. 0 times theorem prover too weak. 1445 trivial. 0 not checked. [2018-07-24 14:32:41,648 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:32:41,649 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5, 7, 8] total 31 [2018-07-24 14:32:41,649 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:32:41,650 INFO L450 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-07-24 14:32:41,651 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-07-24 14:32:41,651 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2018-07-24 14:32:41,651 INFO L87 Difference]: Start difference. First operand 12630 states and 13406 transitions. Second operand 18 states. [2018-07-24 14:32:45,527 WARN L169 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2018-07-24 14:32:47,043 WARN L169 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2018-07-24 14:32:51,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:32:51,201 INFO L93 Difference]: Finished difference Result 24777 states and 26372 transitions. [2018-07-24 14:32:51,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-07-24 14:32:51,202 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1002 [2018-07-24 14:32:51,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:32:51,218 INFO L225 Difference]: With dead ends: 24777 [2018-07-24 14:32:51,218 INFO L226 Difference]: Without dead ends: 11749 [2018-07-24 14:32:51,233 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4092 GetRequests, 4020 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=965, Invalid=4437, Unknown=0, NotChecked=0, Total=5402 [2018-07-24 14:32:51,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11749 states. [2018-07-24 14:32:51,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11749 to 11488. [2018-07-24 14:32:51,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11488 states. [2018-07-24 14:32:51,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11488 states to 11488 states and 12042 transitions. [2018-07-24 14:32:51,413 INFO L78 Accepts]: Start accepts. Automaton has 11488 states and 12042 transitions. Word has length 1002 [2018-07-24 14:32:51,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:32:51,414 INFO L471 AbstractCegarLoop]: Abstraction has 11488 states and 12042 transitions. [2018-07-24 14:32:51,414 INFO L472 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-07-24 14:32:51,414 INFO L276 IsEmpty]: Start isEmpty. Operand 11488 states and 12042 transitions. [2018-07-24 14:32:51,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1085 [2018-07-24 14:32:51,430 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:32:51,431 INFO L353 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:32:51,431 INFO L414 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:32:51,431 INFO L82 PathProgramCache]: Analyzing trace with hash -122340164, now seen corresponding path program 1 times [2018-07-24 14:32:51,431 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:32:51,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:32:51,432 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:32:51,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:32:51,432 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:32:51,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:32:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3700 backedges. 1519 proven. 184 refuted. 0 times theorem prover too weak. 1997 trivial. 0 not checked. [2018-07-24 14:32:52,570 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:32:52,571 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:32:52,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:32:52,579 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:32:52,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:32:52,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:32:53,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3700 backedges. 2217 proven. 6 refuted. 0 times theorem prover too weak. 1477 trivial. 0 not checked. [2018-07-24 14:32:53,459 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:32:54,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3700 backedges. 1519 proven. 257 refuted. 0 times theorem prover too weak. 1924 trivial. 0 not checked. [2018-07-24 14:32:54,687 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:32:54,687 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 24 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:32:54,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:32:54,703 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:32:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:32:55,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:32:55,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3700 backedges. 2217 proven. 6 refuted. 0 times theorem prover too weak. 1477 trivial. 0 not checked. [2018-07-24 14:32:55,950 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:32:56,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3700 backedges. 1519 proven. 257 refuted. 0 times theorem prover too weak. 1924 trivial. 0 not checked. [2018-07-24 14:32:56,750 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:32:56,751 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 7, 8] total 15 [2018-07-24 14:32:56,751 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:32:56,752 INFO L450 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-07-24 14:32:56,752 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-07-24 14:32:56,752 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-07-24 14:32:56,752 INFO L87 Difference]: Start difference. First operand 11488 states and 12042 transitions. Second operand 9 states. [2018-07-24 14:33:00,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-07-24 14:33:00,043 INFO L93 Difference]: Finished difference Result 26362 states and 27670 transitions. [2018-07-24 14:33:00,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-07-24 14:33:00,044 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1084 [2018-07-24 14:33:00,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-07-24 14:33:00,070 INFO L225 Difference]: With dead ends: 26362 [2018-07-24 14:33:00,070 INFO L226 Difference]: Without dead ends: 15065 [2018-07-24 14:33:00,085 INFO L573 BasicCegarLoop]: 0 DeclaredPredicates, 4352 GetRequests, 4332 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2018-07-24 14:33:00,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15065 states. [2018-07-24 14:33:00,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15065 to 13493. [2018-07-24 14:33:00,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13493 states. [2018-07-24 14:33:00,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13493 states to 13493 states and 14158 transitions. [2018-07-24 14:33:00,295 INFO L78 Accepts]: Start accepts. Automaton has 13493 states and 14158 transitions. Word has length 1084 [2018-07-24 14:33:00,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-07-24 14:33:00,296 INFO L471 AbstractCegarLoop]: Abstraction has 13493 states and 14158 transitions. [2018-07-24 14:33:00,296 INFO L472 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-07-24 14:33:00,297 INFO L276 IsEmpty]: Start isEmpty. Operand 13493 states and 14158 transitions. [2018-07-24 14:33:00,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1719 [2018-07-24 14:33:00,329 INFO L345 BasicCegarLoop]: Found error trace [2018-07-24 14:33:00,329 INFO L353 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-07-24 14:33:00,330 INFO L414 AbstractCegarLoop]: === Iteration 18 === [__U_MULTI_f_storage_repos_ultimate_trunk_examples_svcomp_eca_rers_____Problem___label___true_unreach_call_false_termination_c__calculate_outputErr0AssertViolationERROR_FUNCTION]=== [2018-07-24 14:33:00,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1416395048, now seen corresponding path program 1 times [2018-07-24 14:33:00,331 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-07-24 14:33:00,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:33:00,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:33:00,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-07-24 14:33:00,332 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-07-24 14:33:00,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:33:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8971 backedges. 1567 proven. 5277 refuted. 0 times theorem prover too weak. 2127 trivial. 0 not checked. [2018-07-24 14:33:05,882 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:33:05,882 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-07-24 14:33:05,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:33:05,891 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:33:06,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:33:06,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:33:08,762 WARN L169 SmtUtils]: Spent 2.17 s on a formula simplification that was a NOOP. DAG size: 39 [2018-07-24 14:33:10,149 INFO L134 CoverageAnalysis]: Checked inductivity of 8971 backedges. 2938 proven. 68 refuted. 0 times theorem prover too weak. 5965 trivial. 0 not checked. [2018-07-24 14:33:10,149 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:33:20,896 INFO L134 CoverageAnalysis]: Checked inductivity of 8971 backedges. 3000 proven. 127 refuted. 0 times theorem prover too weak. 5844 trivial. 0 not checked. [2018-07-24 14:33:20,918 INFO L297 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-07-24 14:33:20,918 INFO L191 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 26 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-07-24 14:33:20,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-07-24 14:33:20,933 INFO L288 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-07-24 14:33:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-07-24 14:33:22,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-07-24 14:33:28,369 WARN L169 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 39 [2018-07-24 14:33:35,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8971 backedges. 2938 proven. 68 refuted. 0 times theorem prover too weak. 5965 trivial. 0 not checked. [2018-07-24 14:33:35,706 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-07-24 14:33:45,751 INFO L134 CoverageAnalysis]: Checked inductivity of 8971 backedges. 3000 proven. 127 refuted. 0 times theorem prover too weak. 5844 trivial. 0 not checked. [2018-07-24 14:33:45,808 INFO L309 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-07-24 14:33:45,809 INFO L324 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 8, 9, 9, 9] total 42 [2018-07-24 14:33:45,810 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-07-24 14:33:45,812 INFO L450 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-07-24 14:33:45,812 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-07-24 14:33:45,812 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1494, Unknown=8, NotChecked=0, Total=1722 [2018-07-24 14:33:45,812 INFO L87 Difference]: Start difference. First operand 13493 states and 14158 transitions. Second operand 33 states. [2018-07-24 14:33:46,643 WARN L169 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2018-07-24 14:33:46,874 WARN L169 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2018-07-24 14:33:49,529 WARN L169 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2018-07-24 14:33:49,735 WARN L169 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 Received shutdown request... [2018-07-24 14:34:25,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-07-24 14:34:25,266 WARN L540 AbstractCegarLoop]: Verification canceled [2018-07-24 14:34:25,271 WARN L202 ceAbstractionStarter]: Timeout [2018-07-24 14:34:25,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.07 02:34:25 BoogieIcfgContainer [2018-07-24 14:34:25,271 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-07-24 14:34:25,272 INFO L168 Benchmark]: Toolchain (without parser) took 238841.87 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 3.0 GB in the end (delta: -1.5 GB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-07-24 14:34:25,273 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-07-24 14:34:25,273 INFO L168 Benchmark]: CACSL2BoogieTranslator took 777.39 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. [2018-07-24 14:34:25,274 INFO L168 Benchmark]: Boogie Procedure Inliner took 148.93 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-07-24 14:34:25,275 INFO L168 Benchmark]: Boogie Preprocessor took 303.17 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 768.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -868.0 MB). Peak memory consumption was 34.5 MB. Max. memory is 7.1 GB. [2018-07-24 14:34:25,276 INFO L168 Benchmark]: RCFGBuilder took 3825.02 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 141.5 MB). Peak memory consumption was 141.5 MB. Max. memory is 7.1 GB. [2018-07-24 14:34:25,276 INFO L168 Benchmark]: TraceAbstraction took 233780.87 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 3.0 GB in the end (delta: -886.1 MB). Peak memory consumption was 967.3 MB. Max. memory is 7.1 GB. [2018-07-24 14:34:25,281 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 777.39 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 148.93 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 303.17 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 768.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -868.0 MB). Peak memory consumption was 34.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3825.02 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 141.5 MB). Peak memory consumption was 141.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 233780.87 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 3.0 GB in the end (delta: -886.1 MB). Peak memory consumption was 967.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 109]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 109). Cancelled while BasicCegarLoop was constructing difference of abstraction (13493states) and interpolant automaton (currently 25 states, 33 states before enhancement), while ReachableStatesComputation was computing reachable states (1190 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 233.7s OverallTime, 18 OverallIterations, 14 TraceHistogramMax, 127.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1919 SDtfs, 36671 SDslu, 4323 SDs, 0 SdLazy, 55055 SolverSat, 7025 SolverUnsat, 13 SolverUnknown, 0 SolverNotchecked, 88.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37366 GetRequests, 36727 SyntacticMatches, 69 SemanticMatches, 570 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8739 ImplicationChecksByTransitivity, 67.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15315occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 2.7s AutomataMinimizationTime, 17 MinimizatonAttempts, 8273 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.9s SsaConstructionTime, 9.2s SatisfiabilityAnalysisTime, 81.0s InterpolantComputationTime, 28493 NumberOfCodeBlocks, 28493 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 46755 ConstructedInterpolants, 618 QuantifiedInterpolants, 186325689 SizeOfPredicates, 70 NumberOfNonLiveVariables, 26635 ConjunctsInSsa, 325 ConjunctsInUnsatCore, 68 InterpolantComputations, 8 PerfectInterpolantSequences, 118675/135570 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem14_label51_true-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-07-24_14-34-25-293.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem14_label51_true-unreach-call_false-termination.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-07-24_14-34-25-293.csv Completed graceful shutdown